Coiled-spring holding device.



w. A. SCHENCK. COILED SPRING HOLDING DEVICE.

armcmou men m. 23. ms.

' 3 21,85, Patented Oct. 15, 1918, I

UNITED STATES PATENT UFFICE.

WILKENS A. SCHENGK, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 GABRIELLE A. M. SCHENCK, OF PHILADELPHIA, PENNSYLVANIA.

COILED-SPRING HOLDING DEVICE.

Specification of Letters Patent.

Patented Oct. 15, 1918.

To all whom it may concern:

Be it known that I, WILKENS A. ScHnNcK, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented a CoiledSpring Holding Device, of which the following is a specification.

One object of this invention is to provide a holding device in the form of a helical coil which in one form shall be available for use as a bindin ferrule acting by virtue of its tendency to decrease its diameter after application to the object with which it is to be used.

It is further desired to provide a holding device in the form of a coiled body, preferably of spring material under stress upon a suitably formed structure with which it is to cooperate so that it places said structure under compression and is frictionally held to the same.

These objects and other advantageous ends I secure as hereinafter set forth, reference being had to the accompanying drawings, in which,

Figure 1 is a perspective view illustrating my invention as designed to serve as a ferrule for a tool handle;

Fig. 2 is an enlarged perspective view of the metallic coil illustrated in Fig. 1, and shown as made of spring wire of circular section;

Fig. 3 is a perspective view of a spring ferrule similar to that shown in Fig. 2 except that its component wire is rectangular in section.

In Figs. 1 and 2 of the above drawings 1 represents a wooden handle such as is used for holding files, chisels or similar tools, etc, and this is provided with a central longitudinally extending hole 2 in one end for the reception of the tang of such a tool. Its end immediately adjacent this hole is of approximately cylindrical form and is preferably made with two radially extending kerfs or cuts 3 formed at right angles to each other. In place of the cylindrical sheet or cast metal ferrule commonly mounted on this cylindrical portion 4:, I provide a helical coil 5 of spring wire which may be of circular section as shown in Fig. 2 or, as indicated at 5a in Fig. 3, may be of some other section, such as rectangular.

It is to be understood that the coils are wound on a suitable mandrel or are otherwise so formed that their internal diameter is less than that of the portion 4 so that considerable force is necessary in order to apply them to it. In so forcing one of these coils into place it is necessarily expanded;that is, it is unwound to a greater or less extent by reason of the forcible increase in its diameter. As a consequence, after being given the position relatively to the handle shown in Fig. 1, it constantly exerts a compressing force upon the cylindrical end thereof, closing the cuts, if the wood is sufiiciently flexible, and being capable of expansion when the tang of a tool is forced into the openin 2.

nder such conditions the coil acts at all times to force the wood into the closest gripping engagement with said tang so that its unintentional removal is effectually prevented.

I claim 1. The combination with a tool handle hav ing a central opening and kerfs formed in the end of the handle and extending radially of the opening, of a ferrule formed of convolutions of spring metal, said coils being normally of slightly less diameter than that of the end of said handle whereby when the ferrule is forced upon the handle it is maintained under stress and compresses the divided end of said handle.

2. The combination with a tool handle having a central opening in one end thereof said end of the handle being longitudinally split and with the split portions extending radially of the opening, of a ferrule surrounding the split end of the handle and formed of a series of convolutions of spring metal, the normal diameter of the ferrule bein less than that of the split end of the ban le whereby when the ferrule is forced upon the handle it is expanded and thereafter is maintained under stress around said split portion of the handle, said coil having its ends free and unconnected to said handle.

W'ILKENS A. SCI-IENCK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

